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通过对不同研磨时间磷块岩样品的粒度、比表面积、XRD分析、SEM分析以及元素溶出性能的测试,系统的研究了湿法研磨时磷块岩的机械力化学效应。结果表明:在湿法超细研磨体系中,研磨时间的增加可以显著降低磷块岩颗粒粒径、增大比表面积、改善矿粉表面形貌并提高晶格结构无序化程度。这些物理性质的改变促进了磷块岩中P、Ca和Mg元素的溶出,在研磨25 h时,3种元素释放量最大,分别为28.51、24.65和10.04 g/kg。
The mechanical and chemical effects of phosphate rock during wet grinding were systematically studied by measuring the particle size, specific surface area, XRD, SEM and elemental dissolution of the samples. The results show that in the wet ultrafine grinding system, the increase of grinding time can significantly reduce the particle size of phosphorite, increase the specific surface area, improve the surface morphology of slag and improve the disordered lattice structure. The changes of these physical properties promoted the dissolution of P, Ca and Mg elements in phosphate rock blocks. The maximum release of the three elements was 25.51, 24.65 and 10.04 g / kg, respectively, after milling for 25 h.